SMB1 Glitched Worlds 

So I looked into it and found exactly which worlds you entered. 2:52 World 94, 5E in hex (Blue Square) [Sadly, not in the 100s.] 11:13 World 68, 44 in hex (Blue Square with a dot) [It's part of the empty coin block texture.] 24:38 World 54, 36 in hex (Cloud texture) [Took so long to find.] 27:14 World 118, 76 in hex (New Cloud Texture) [Actually a mushroom texture.] 30:16 World 200, C8 in hex (Bullet Bill Launcher) [Exactly 200. :O] 38:27 World 34, 22 in hex (Y) [Why not?] 40:38 World 1, 01 in hex (1) ["Aw man, it didn't work." =(] 41:29 World 123, 7B in hex (That's a coin?) [They were very right.]

Your Mario gameplay looked kinda good you should try speedrunning the game. There is a category called any% where people try finish the game as fast as possible. You should give it a try!

Some insight into why this works, as I understand it: Nintendo wanted the high score to persist after reset. But power-on and reset both take you to the same spot in your game's code, so this couldn't be achieved without some trickery. The trickery was this: put a signature (maybe 3 or 4 bytes) at the end of RAM, and only initialize memory if that signature is _not_ present. They also checked whether the high score was valid (all digits 0-9). That was all fine and good for preventing corruption in most cases, but here's the problem: Tennis used the _same technique._ Same signature, same addresses, same everything. Maybe they copy/pasted their code from Stack Overflow... The upshot of this is that Super Mario Bros. considers RAM states from Tennis to be valid, and vice versa. That's why the world number isn't cleared and why you can explore all these places--and why the score persists when you switch from Tennis back to Mario! That's also why it _doesn't_ work on the rare Super Mario Bros./Duck Hunt cartidge: the multicart reset routine does its own thing before Mario gets a chance, and I guess it clears the RAM no matter what.

"Sorry, Mario, but our princess is in another castle" - Princess, 2018

30:17 I love the sync between the music and you saying "Bullet Bill launcher dash one" xD

When you think you know everything in SMB, Kosmic makes another video.

2:05 Neat how Mario loaded the Tennis sprites in but kept the level

Oddly intrigued by this. Went from not really ever seeing any SMB 1 speedruns, to watching kosmic's world record play, his explanation, and then this. 3 hours I really needed to be getting the work I brought home finished. Thanks a lot.

IIRC, it's your player's X coordinate in Tennis that influences your start world in Mario.

You're the new Tetris world champion! That was fun to watch.. had no idea those glitches ever existed! Coolio!

7:47, dude... you gotta go play Tetris with those hypertapping skills!

I’m curious. Could there be potential for a Super Mario Bros. speedrunning category called “Tennis%” or something? Where you start off in SMB, switch to Tennis, go back to SMB, and warp to World 8, and then beat the game. It could be a really risky thing to put your Famicom games through, though.

What fascinates me the most is not the weirdness of the levels, but the fact that it doesn't simply crash. I wonder if Nintendo coded the game in a way so it's super stable.

Why did I love this video so much? Quality entertainment.

This was a much more fun video than I thought it would be! I wholeheartedly enjoyed this video!

You know what your viewers want. This is the good shit, keeep it up. I do wish though that you would repeat what some of the live commenters were saying. A lot of your responses to them I have no idea what you are talking about lol

Peach: "Thank you Mario, but our princess is in another castle..." INCORRECT. By the way, Tennis on the NES looks more fun than Grand Theft Auto 5 Tennis.

Fun fact: the swapping cartridges trick is used in speedrunning Jumbo Ozaki no Hole in One Professional for ting manipulation

Had a lot of fun watching this, please upload more stream highlights :D

I love seeing the games with another game's CHR maps.

Really though, the reason why there's a sprite for the number is because for the minus world glitch, world 36 is displayed as a blank sprite, so after world 8 it just puts random sprites there I guess.

"More bowser! Disappearing bowser! Invisible bowser! ". 😂😂😂

2:06 Huh, you can see for a second the Tennis's CHR map sprites replacing the ones in the SMB tiles before Tennis actually loads.

Underwater 4-3... with BOWSER! I would get a famicom simply to play with this all day-- it's hilarious.

Oh my god, I love that the first iteration is exactly like one of the crazy worlds that Kinamania showed in Dendy Chronicles. Just immediately from the get go.

I love how when you put Tennis in after SMB it changes the graphics and looks all cool

"Thank you Mario! But our princess is in another castle!" - Princess Peach, 2018

Sweet video Young Sheldon. I didn't know about that glitch trick.

My theory said that, If you swap between Super Mario Bros. and Tennis carts, the Famicom is confused between the Tennis data, and the Super Mario Bros. data, as the games can only be loaded one at a time. So, when you're playing Tennis, a bit of Super Mario Bros was left off, the part when you took SMB, those glitched parts are left off, making its way to Tennis. Similarly, when you took off Tennis, the glitched parts are left off, mixing the SMB data and Tennis data, making their way to SMB, as a result, those mixed data mix with yet another SMB data, creating those levels.

You should create a new SMB speedrun category called Any% Tennis where players swap the cartridges during gameplay and try to reach a point where the game declares itself beaten, just like you did.

This is the idea of lost level comes from

Beat Blue Square WR?!?!?!

These videos never get old

This is awesome. I wish I had a Famicom.

Cool the Famicom carts are like the SNES ones in the US, god those NES games were hard to remove!

Nice to see you talking abut Tennis.

Boom Tennis for Kosmic

1:06 (onwards) The confusion between Tetris and tennis is maybe because the name Tetris was derived from tennis, which Alexey Pajitnov (who invented Tetris) liked to play.

Somehow, some way, I didn't actually know that SMB1 had coin heaven levels until I stumbled upon this video like a year ago.

These are the true lost levels

congrats on 100k views on this video kosmic

Legends say Mario is still going inside that pipe

love how this glitch relies on two games with mario in them.

Kosmic ... why are you purple? edit: sorry guys, I'm stupid. it's the reflection of the lavender-ish pixels in the background on his face

30:18 original lyrics by kosmicd12

7:20 what if you get a hacked rom that allows you to jump in these cutscenes an you escape this? What would happen?

never thought about that, that 1-1 is the only level with no piranha plants in the pipes. :0 but true, in 1-2 it already starts.

Mario is stuck in a Groundhogs Day loop. Who knew tennis was to blame? If only Bill Murray knew.

It's how many steps you take in tennis that it teleports you to whatever. So 1 step= 1-1(?)

I really want you to play Tennis live!

Who else was weirded out by the glitch’s switching between games?

Really nice vid, I enjoy it a lot

Underwater 4-3 with *BOWSER* sounds like a clickbait title

"Someone could actually have gotten that world record on their first try." The first person to do anything got the world record time for doing it... even if no one knows about it.

Get a tennis WR and a SMB1 WR

If you want a SMB randomizer and you don't have a flashcard/don't want to use an emulator, there is a without hacks method to it! (IDK if I'm right but this may be risky)

That is pretty fun and impressive!

It's a fault because you're hitting the ball to the big rectangle in the back, when you're only allowed to serve the ball to the small rectangle on the opposite side (left/right) to where you start from.

Is Kosmic Thanos?

i lov u komsic

So what actually _is_ the difference between the two types of blocks in the stairs? There's no chat in this video.

I have a guess as to why some are utterly random when others are real levels with the environment changed. I bet the first 2 or maybe 3 bits of the level number set the environment type, while the rest are the memory pointer for where to find the level layout. Thus, if you get 1011 1010 but a real level is 0011 1010, you’ll get a real level pallet-swapped, but if you read 1011 0001, and there isn’t a level with that address, you get weird garbage data. This is just an educated guess of course, but it’s probably close.

looping back and forth forever. :)

Blue Square - 55 will appear as -Crown and a piece of the Title Screen iirc

If Kosmic were to play super mario flash id be ROFL'ing

7:05 All that we see or seem. Is but a dream within a dream.

In glitch worlds, going to an exit point like the end of a level or a vine will take you to the beginning of a map

this is the path my parents used to get to school

In 5:05 I thought "Will it happen again?" And In 5:08 I KNEW it!

Makes me wonder if that same technique works on Baseball. I doubt it, but it'd be interesting if the generic Nintendo sports games had similar properties to Tennis.

this is how to get more minus worlds!

not sure if it was time or ROM limitations but as a programmer you should never assume that everything is correctly inizalized from the start. especially in assembly on such hardware. always imagine memory being filled with completely random data and you need to clean up a bit before you can use it

Coin - 1 is probably an axe.

41:55 #Goombalivesmatter

Tennis speedrun coming soon

Those sized cartridges are popular in India too.

The tennis judge is Mario

"Retro Game Mechanics Explained" made a video exploring and explaining this phenomenon, you should check it out to see why this happens exactly.

The worlds always let me call them world thundercloud -1

2-1 is like like mario purgatory and you can't escape

Haha, wut? Wonder what other cart swaps this might work on...

That was awesome.

Then: smb Now: NSMB2UDUE

There are game genie codes too that allow you to access these too

What's world 94 and world 68?

back in time for me as akid there was a Chaines console do like that

13:48 SMM in it's early days be like

13:53 did bowser turn into a koopa!?!?

World 5E points to level IDs A8,A8,A8,A8,A9,A9,A9,AA,AB... World 44 points to level IDs 88,95,0F,08,30,4C... World 36 points to level ID 64 (points to the end of World 8's level ID list data) World 76 points to level IDs 26,60 (points to the end of World 1's level ID list data) World C8 points to level IDs A7,A8,A8,A8,A8,A8,A9,A9,A9,AA,AB... World 22 points to level ID 1F World 01 points to level IDs 25,29,C0,26,60 World 7B points to level ID C6 Note the the MSB (bit 7) of the level ID doesn't matter, since the whole value gets shifted left one bit so it can properly be used as an index into the level/enemy data pointer tables. Thus there are only 128 possible unique level IDs. Additionally, some of these are water/ground/cave variants of existing levels. This is because bits 5 and 6 determine the type of level (00 means underwater, 01 means overworld, 10 means underground, and 11 means castle). This value is then extracted and used in a pointer table with four entries, each entry in turn points to another pointer table for the actual levels. These larger pointer tables are stored in the order corresponding to the level type bits, thus the overlap (though the enemy pointer tables are stored in a different order, which is why they appear somewhat scrambled) (note that a separate set of pointer tables is used for the objects and enemy placement data). Some objects are drawn/interpreted differently based on the area type (among other things). The horizontal/vertical brick block object will draw seaplants instead if the area type is underwater. Additionally, mushroom platforms, tree platforms, and bullet bill launchers are all the same object, and the game determines which set to use for the area based on two bits in the object data header. (the fourth setting for these bits sets the ground to use the cloud blocks). Some of the level pointers even point to RAM, making them quite volatile. Area 4C, for example, points to $4CA4 (a non-existant memory location when using the NROM mapper).

very interesting, I think this is how I got the hidden secret contra 2 weapons when I was a kid. NES games have the best glitches... pc games just have lame ''error unhandled exception'' and your game exists or just can't run. Lame.

Is it just me or is the triangle in the castle theme just a LITTLE bit too early?

So basically,what are you saying(not actually saying,just my thought) probably you can skip the whole mario game(directly to 8-1 or 8-4) by just playing tennis? Thats some crazy ass shit

5 years ago

At 17:20, he activated my Siri

it's possible to go to the right with a very hard to do clip in 4-2

Can it work with other games besides Tennis? If not, why not? Why specifically Tennis?

SMB Glitched world speedrun WR

l needed to press A+START on title screen after play tennis without turn off the nes when you remove the game it glitched out press the reset to start new game

TETRIS

25:05 LMAO